– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 am Sun 20 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sun 20 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Warm (max 22°C on Sun afternoon, min 10°C on Tue night). Wind will be generally light. | Days 4–6 Weather SummaryHeavy rain (total 29mm), heaviest during Fri morning. Very mild (max 15°C on Wed afternoon, min 7°C on Fri morning). Wind will be generally light. | |||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  | | | | | | |  |  |  |  | |  | |
clear | clear | clear | some clouds | clear | some clouds | clear | clear | some clouds | clear | some clouds | some clouds | cloudy | light rain | heavy rain | rain shwrs | rain shwrs | rain shwrs | |
Cloud base (m) | 9400 | 9400 | 6500 | 7000 | 2350 | 2100 | 2050 | 6550 | 3350 | 2300 | 550 | 600 | 700 | 1950 | ||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.7 | 15 | 11 | 2 | 0.2 |
max °C | 20 | 22 | 18 | 17 | 19 | 13 | 13 | 15 | 11 | 13 | 15 | 12 | 14 | 13 | 11 | 8 | 10 | 8 |
min °C | 16 | 22 | 15 | 15 | 18 | 11 | 11 | 15 | 10 | 10 | 15 | 11 | 12 | 12 | 9 | 7 | 9 | 7 |
chill °C | 16 | 22 | 15 | 15 | 18 | 11 | 11 | 15 | 10 | 10 | 15 | 11 | 12 | 12 | 8 | 6 | 8 | 6 |
Freezing level m | 3950 | 4000 | 3900 | 3600 | 3450 | 3150 | 2500 | 2500 | 2350 | 2350 | 2650 | 3000 | 2750 | 2550 | 2150 | 1700 | 1900 | 2000 |
 | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — |
 | — | 7:09 | — | — | 7:07 | — | — | 7:06 | — | — | 7:04 | — | — | 7:01 | — | — | 7:00 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Warm (max 22°C on Sun afternoon, min 10°C on Tue night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Heavy rain (total 29mm), heaviest during Fri morning. Very mild (max 15°C on Wed afternoon, min 7°C on Fri morning). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
SHIP6522 | |||||
 | |||||
Bellingham Airport | | ||||
SHIP7993 | |||||
SHIP3558 | |||||
SHIP6926 | |||||
SHIP4115 | |||||
SHIP8482 |
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.